真是有麻烦到您了!帮我看看我的文章还有要改正的地方吗?

真是有麻烦到您了!帮我看看我的文章还有要改正的地方吗?
My favorite mode of transportation
There are many means of transportation in the world,such as：trains,cars,planes and ships .These ways are convenient and cheap.However I like cycling the most.
Cycling is the world's most common mode of transport.Cycling can help you to keep health and build muscle.Over-weight people can lose their weight by cycling.And it is important that cycling is green and does not pollute the air .When we travel by bike,we can breathe the fresh air,enjoy the beauty of the surroundings,and forget all the problems.
Please be slow when riding,avoid traffic accidents,and ensure the safety of life
That's why I like riding a bike.I ride to school everyday,so I am very fit and healthy
Thank you very much